Motor for deep well pumps



Aug. 24, 1937. H. M. HALLGARTH MOTOR FOR DEEP WELL PUMPS Filed Sept. 3, 1935 2 Sheets-Sheet l INVENTOR. HORACE M. HALLGARTH 4, 1937. H. M. HALLGARTH 2,090,676

MOTOR FOR DEEP WELL PUMPS Filed Sept. 5, 1955 2 Shets-Sheet 2 ig. 4 M f\ INVENTOR.

HORACE M. HALLQARTH ATTORNEY.

Patented Aug. 24, 1 937 UNETED STATES PATENT OFFIQE MOTOR FOR DEEP WELL PUMPS Horace M. Hallgarth, Galva, Kans. Application September 3, 1935, Serial No. 38,865

1 Claim.

My invention relates to improvements in pump jacks.

The object of my invention is to provide a pump jack having a long stroke, hydraulically operated with automatic control for continuous pumping and adaptable to oil well service.

A further object of my invention is to provide a simple and efilcient means to disengage any one or more of a group of pumps along the power line in an oil field without interruption of pumps chosen to continue their function.

A still further object of my invention is to provide means to return the fluid such as oil or gas to storage after being used to operate the pumps, by which means excess waste of fluid is 5 avoided.

These and other objects will hereinafter be more fully explained reference being had to the accompanying drawings forming a part of this specification and in which like characters will apply to like parts in the different views.

Referring to the drawings:--

Fig. 1 is a front view of the pump jack mechanism.

Fig. 2 is a plan View with counter balance removed.

35 at the base of the two cylinders, the ports in feed position.

Fig. 8 is an enlarged sectional view of the valve controlling the trip of the valve shown in Fig. 7, the port in feed position.

My invention herein disclosed consists of a pair of cylinders l--l spaced apart and seated on a suitable foundation 2, centrally bored in axial alignment to receive a casing 3 of an oil well extending upward through the bore and having 45 on the upper end thereof a conventional type of stufiing box 4, through which the polish rod 5 will work reciprocatingly with a smooth running fit as actuated by the said cylinders.

Extending through the oil field is a high pressure pipe line from which laterals may extend to the various oil wells in the field, at which points are positioned pump jacks to force the oil into the pipe lines, conveying the same to 55 market or storage and to increase the pumping capacity I have arranged a long stroke motor hydraulically operated for each well substantial- 1y as shown in Figs. 1 and 2.

Extending from the laterals or main pipe line as the case may require, is a pipe 6 extending upward and toward the cylinders, connecting to the base of each by pipes l and 8 as conductors for compressed fluid into said cylinders.

Positioned in each cylinder is a piston 9 having a rod 10 centrally connected and extending upward and outward through the upper head of the cylinder; theupper ends of the rods are connected by a yoke H and to which the said polish rod is attach-ed and subject to being raised when the pistons are exercised by forcing fluid in at the base of each cylinder simultaneously through the action of valves later described, the said valves also control the exhaust of the fluid for the return stroke of the polish rod that is gravity actuated and each stroke automatically controlled as follows:

In Fig. 7 is shown the valve control for cylinders ll, the port position is for the exhaust of said cylinders and by turning the port core 90 degrees in the direction of the arrow, the exhaust will close, turning in the supply for said cylinders to raise the polish rod.

In Fig. 8 is shown the trip valve control, the port position as shown is to energize the trip mechanism which in turn will actuate the said cylinder valve as above described. When the core as shown in Fig. 8 is turned 90 degrees in the direction of the arrow the supply will cut off to allow exhaust of the trip compression tube.

Positioned in working relation tothe valves and cylinders is a valve trip consisting of a tubular element l2 having a head to close each end thereof, the upper head has a pipe l3 connected thereto and a valve M positioned therein, the lower head is bored axially with the tube so that rod [4 willslidably engage therein, the said rod has secured to its upper end a piston I5 adapted to engage in the said tube with a smooth,

running fit reciprocatingly.

The lower end of the said rod is connected to a valve lever l6 through the medium of a link ll, each end of which is hingedly joined as at A and B to their respective lever and rod, by which means the core of valve I8 is turned to and fro for reciprocating movement of the pistons of cylinders l-l.

The injecting position of the valve core as shown by dotted line C in valve I 8 is accomplished by fluid compression in tube l2 for downward stroke of piston 15, the action of which is controlled by valve l4, having a lever I9 as turning means therefor and being actuated by rod pendently carried by an arm 2| secured to the yoke and carried reciprocatingly therewith, and is adapted to slidably engage in slot 22 of lever l9, moving the latter downward as stop 23 contacts therewith opening the said valve simultaneously with the maximum downward stroke of pistons 9.

The opening of said valve is means to inflate tubular element l2 as opening means for valve 5 to inject fluid into each of the cylinders l-| through their respective pipe connections previously described, and the piston in each cylinder is caused to make its upward stroke and during such stroke the said valve trip is retained to engagement by the flow or pressure through pipe 24, all of which is accomplished by the valve ports position as shown by dotted lines in Fig. 4.

As the pistons carrying the polish rod therewith approach their maximum upward stroke, stop 25 on rod 20 will raise valve lever l9 turning its core port to an exhaust position and closing feed pipe 24, simultaneously connecting exhaust pipes l3 and 26, at which instant piston I5 is released and raised by a coil spring 21 discharging the contents of the said tube through pipes 26 and 28 as the main drain.

The upward movement of the said piston l5 will turn the ports in valve [8 to exhaust through pipe 6' into pipe 28, this exhaust being the drain for cylinders l-| that is gravity actuated by the polish rod, should the latter described exhaust force be too great, tending to back up in pipe 26, the result of which would be to prematurely actuate the said valve trip, and to overcome such action I have placed a check valve 29 in pipe 26 as an emergency for such condition, which at all times will resist excess pressure 40 from cylinders l-I in their tendency to create pressure in pipe 26 or as above stated.

A counter balance is provided for the polish rod through the medium of a beam 30 pivotally mounted on a Sampson post 3|. The said beam is 45 equipped with an arcuated mule head 32 with cable 33 attached and connected to the yoke; se-

cured to the other end of the said beam is a cable 34 as pendant carrying means for weights 35 to partially balance the weight of the said polish rod.

In Fig. 3 is shown a modified form for the yoke, transmitting the load of the polish rod to each end thereof, by which means an unequal lifting power of the cylinders will be partially counter balanced, as the load center will move from the weaker cylinder by the rocking movement of the downward extension D, and such other modifications may be employed as lie within the scope of the appended claim.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is:-

In a motor of the class described, a pair of cylinders vertically positioned in close proximity to each other, each of said cylinders having a piston and a rod, the rods having means to connect the outer ends thereof and the said means to carry an oil well polish rod reciprocatingly with the pistons as an oil well pump, an oil supply pipe connected to the lower end of each cylinder, a supply and exhaust valve in the said pipe, said Valve having an exhaust pipe connected thereto and the valve core having a lever to turn the same, a tubular oil container as a valve trip and a pipe as supply and exhaust therefor, another similar valve in the last said pipe and a slotted lever to turn the core of the valve, a rod carried by the said piston rods of the cylinders, the said rod to slidably engage in the slot of last said lever as means to alternately turn the core of last said valve oppositely to by-pass fluid alternately to the said trip element, and an exhaust pipe therefor by which means, the lever of the first said valve is actuated downward to exhaust fluid contained in said cylinders, and the said trip element having a spring to oppositely turn the core of the valve to by-pass fluid under pressure into said cylinders, all substantially as shown and for the purpose specified.

HORACE M. HAILGARTH. 

